A spherical ball $($hollow sphere$)$ with mass m $=1\mathrm{.}00$ kg and radius R $=20\mathrm{.}0$ cm rolls with a speed of v$1=5\mathrm{.}00$ m$/$s towards a hill of h$=2\mathrm{.}00$m$.$ At the top of the hill it reaches a horizontal plateau, before flying over the edge and landing on the ground some distance d from the bottom of the cliff. $($a$)$ What is the speed v$2$ of the ball after it has rolled up the hill and just before it goes off the cliff? $($b$)$ What is the $($translational$)$ speed v$3$ of the ball just before landing?